000			04678namaa2200445 i 4500
003			OSt
005			20250223033314.0
008			241016s2022 ua a|||f |m|| 000 0 eng d
040			_aEG-GICUC _beng _cEG-GICUC _dEG-GICUC _erda
041	0		_aeng _beng _bara
049			_aDeposit
082	0	4	_a617.69
092			_a617.69 _221
097			_aM.Sc
099			_aCai01.09.09.M.Sc.2022.Ah.R.
100	0		_aAhmed Mohamed Erfan Gamal Eldein, _epreparation.
245	1	0	_aRetention Of Cast Chrome-Cobalt Versus Milled Chrome-Cobalt Telescopic Retainer For An Implant Supported Overdenture : _bAn In Vitro Study / _cBy Ahmed Mohamed Erfan Gamal Eldein; Supervisors Prof. Iman Abd El Wahab Radi, Dr. Nouran Abd El Nabi, Prof. Mohamed Ahmed Helal, Dr
246	1	5	_aالابقاء علي الكروم- الكوبلت المصبوب مقابل الكروم- الكوبلت المخروط المثبت تلسكوبيا لطقم فوقي مثبت بالزراعه : _b دراسة في المختبر /
264		0	_c2022.
300			_a124 pages : _billustrations ; _c25 cm. + _eCD.
336			_atext _2rda content
337			_aUnmediated _2rdamedia
338			_avolume _2rdacarrier
502			_aThesis (M.Sc.) -Cairo University, 2023.
504			_aBibliography: pages 92-122.
520			_aThe present study was carried out to compare the retention of two groups of frameworks having different methods of construction. Both frameworks were used to retain four implant-supported mandibular overdentures. Retention was evaluated using universal testing machine after mechanical aging that was carried out using chewing simulator. The intervention group was the milled Co-Cr framework group while control group was the cast Co-Cr framework group. One epoxy models of completely edentulous mandible were constructed and prepared to receive four implants in each model. Six frameworks were constructed; three cast Co-Cr frameworks and three milled Co-Cr frameworks. Then retention values were measured at baseline using universal testing machine and then the models in each group were subjected to different chewing cycles 12500 and 37500 cycles using ROBOTA chewing simulator. Both the cast and the milled cobalt-chromium groups showed a statistically significant decrease in retention when subjected to different cycles. At baseline, Group C recorded (12.846 ± 1.604) while Group M recorded (15.552 ± 1.408). After 12500 cycles (1 month), Group C recorded (11.001 ± 1.411) while Group M recorded (14.818 ± 1.286) and after 37500 cycles (3 months), Group C recorded (9.046 ± 0.696), while Group M recorded (9.0319 ± 1.374) with P<0.0001. The overall % change in retention recorded (-29.58%) in Group C while it recorded (-40.078%) in Group M.
520			_aأجريت هذه الدراسة لمقارنة الكروم- الكوبلت المصبوب مقابل الكروم- الكوبلت المخروط المثبت تلسكوبيا لطقم فوقي مثبت بالزراعه. باستخدام آلة اختبار عالمية بعد التقادم الميكانيكي الذي تم بواسطة جهاز محاكاة المضغ. كانت مجموعة التدخل عبارة عن الكروم- الكوبلت المخروط مرفق كانت مجموعة التحكم الكروم- الكوبلت المصبوب هي مجموعة محدد المواقع. تم بناء نموذجان من إيبوكسي للفك السفلي عديم الأسنان تمامًا وتجهيزه لتلقي اربعة غرسات. تم بناء عشرة أطقم مثبتة. ثم تم قياس قيم الاحتفاظ بعد التقادم الميكانيكي. تم جدولة النتائج وتحليلها إحصائيا للوصول إلى النتيجة.
530			_aIssued also as CD
546			_aText in English and abstract in Arabic & English.
650		7	_aimplant overdentures _2qrmak
653		0	_atelescopic attachments _aretention _acast Co-Cr telescope _amilled Co-Cr telescope _amechanical properties _asurface characteristics _amicrostructure characteristics
700	0		_aIman Abd El Wahab Radi _ethesis advisor.
700	0		_aNouran Abd El Nabi _ethesis advisor.
700	0		_aMohamed Ahmed Helal _ethesis advisor.
700	0		_aKhaled Aziz Abd El Wahab _ethesis advisor.
900			_b2022 _cIman Abd El Wahab Radi _cNouran Abd El Nabi _cMohamed Ahmed Helal _cKhaled Aziz Abd El Wahab _UCairo University _FFaculty of Dentistry _DDepartment of Removable Prosthodontic
905			_aEman El gebaly _eHuda
942			_2ddc _cTH _e21 _n0
999			_c168432